Transpression and restraining jogs in the northeastern Yilgarn craton, Western Australia

The structural framework in the northeastern Yilgarn craton of Western Aust ralia was largely shaped by transpression. Local shortening induced by sini stral strike-slip on right-stepping. NNW-trending regional shear zones led to the development of N- to NNE-trending folds and reverse faults within th e Laverton, Duketon and Yandal restraining jogs, and at the northwestern te rmination of the Kilkenny shear zone. The restraining jogs formed late in t he tectonic history of the area, and each contains a diagonal transfer shea r zone that merges with the bounding shear zones. Sinistral strike-slip mov ement on the NNW-trending regional shear zones (D-3) followed regional fold ing and shortening (D-2). D-2 and D-3 were probably progressive and overlap ping tectonic processes. The first deformation event (D-1) is poorly unders tood. but appears to have involved at least locally significant N-S thrusti ng. The style of deformation described herein has not been widely reported from other Archaean granite-greenstone terrains but is unlikely to be uniqu e to the northeastern Yilgarn craton. (C) 2001 Crown Copyright Published by Elsevier Science B.V. All rights reserved.